The Sordin Supreme Pro-X SFA, based on the new Sordin Flexible Attenuation (SFA) concept, is developed with the user and ever-changing conditions in mind. At SNR 31 dB, it safely protects your hearing even in extreme noise environments, while providing instant interchangeability for a slimmer cup designenabling optimization for different operating environments or helmet compatibility needs. This model is also based on military SLIM-standard and is specially designed to fit even wider head shapes. An extra broad headband adds to stability on larger head shapes. ARC-rail compatible to enable helmet mounting. Sordin Supreme is huntersand shootersfirst choice of electronic hearing protector. Based on Sordins military-graded models, Sordin Supreme meets the most stringent demands of quality and functionality. Sordin Supreme is legendary for its excellent audio reproduction. It protects you from hazardous noise while allowing you to hear harmless sound through the cups. Surrounding